Sheridan's resistance as a result of his contact with the Vorlons (and presumably also with Lorien) is a fascinating detail.

I think the point is that they were both touched by Vorlons specifically, Sheridan by Kosh, and Lyta by Kosh II, and so Sheridan could still have power over Lyta when no one else could. Don't think it's connected to Lorien's healing.

Quote:

Originally Posted by Estelyn

Delenn's pregnancy appears to be unexpected. I would think that it would have had to be engineered and consciously sought in a cross-cultural marriage, but for whatever reasons, it's possible without that effort, I guess.

The Chrysalis is what made Delenn's pregnancy possible by making her genetically compatible with humans.